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General Relativity and Quantum Cosmology

Title:
Kaluza-Klein Gravity

Abstract: We review higher-dimensional unified theories from the general relativity,
rather than the particle physics side. Three distinct approaches to the subject
are identified and contrasted: compactified, projective and noncompactified. We
discuss the cosmological and astrophysical implications of extra dimensions,
and conclude that none of the three approaches can be ruled out on
observational grounds at the present time.

Comments:

99 pages, no figures, Latex (uses elsart.sty and elsart12.sty) Also available at this http URL